I find the best way to use RSO is to ingest it.

If you are not a regular THC user start with .5 to 1 grain of rice sized glob on a tooth pick. You can put the toothpick in the fridge or freezer for a couple minutes to harden the oil up, then scrape off the toothpick with the back of your teeth and swallow the oil like a pill. Another option is to smear the same amount onto a chocolate chip or small edible of some sort and suck on, or swallow the candy like a pill.

To smoke, use a dab rig or a pin to drop onto any suitable heating element (stove burner, etc.) and inhale with a pen or top half of a bottle. This is very potent, start with about the same as recommended for ingestion. Alternatively, spread a thin layer on a rolling paper and wrap around organic tobacco or cannabis.

Hope this helps!